Improvement in middlings-separators



2 Sheets-Sheet 1.

R. J. SKINNER. Middlings-Separator.

No. 218,583. Patented Aug. 12,1879.

WITNESSES I ATTORNEYS. I

N. PETERS. FHOTD-LITHOGRAPHER. WASHINGTON. D C.

2 Sheet-Sheet 2 R. J. SKINNER. Mi-ddlings-Separator.

No. 218,583. Patented Aug. 12,1879.

WITN SSES ATTORNEYS NPETERS. PHOTO-LITHOGRAPHER. WASHINGTON. D C- UNITEDSTATES PATENT OFFICE.

RICHARD J. SKINNER, OF OSWEGO, NEW YORK.

IMPROVEMENT IN MlDl DLlNGS-SEPARATORS.

Specification forming part of Letters Patent No. 218,583, dated August12, 1879; application filed December 9, 1878.

To all whom it may concern:

Be it known that I, RICHARD J. SKINNER, of Oswego, in the county ofOswego and State of New York, have invented a new and useful Improvementin Middlings-Separators, of which the following is a specification.

Figure 1, Sheet 1, is a vertical longitudinal section of my improvedmachine, taken through the line as :10, Figs. 2 and 3. Fig. 2, Sheet 1,is a vertical cross-section of the same, taken through the line y 3Fig. 1. Fig. 3, Sheet 2, is a top view of the same, partly in section toshow the construction. Fig. 4, Sheet 2, is a detail section of the brushand its slidingblock, taken through the line z 2, Fig. 5. Fig. 5, Sheet2, is a detail view of the brush and its sliding block.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improvedmiddlings-purifier which shall be simple in construction and efi'ectivein operation, doing its work rapidly and thoroughly.

The invention will first be described in connection with the drawings,and then pointed out in the claims.

A represents the frame of the machine, which is inclosed at its sidesand ends, and the top of which is made in the form of a half-arch, asshown in Fig. 1.

The middlings are fed into the hopper B, which is made long and narrow,and V-shaped in its cross-section, and has a long narrow opening in itsbottom.

The hopper B is placed in the feed-box O, which is made with aperforated bottom, and is provided. with a sliding false bottom, 0. Thesliding bottom 0 is perforated to correspond with the perforation of thetrue bottom, so that the size of the discharge-openings may be regulatedbyadjusting the said sliding bottom 0.

From the feed-box O the middlin gs fall upon the inclined feed-board D,which is attached to the forward part of the frame of the screen E. Thescreen E is provided with a bolt-cloth in the usual way. The screen E issuspended from the frame A by pivoted straps F in the usual way.

To a cross-bar attached to the frame of the screen E is attached theinner end of a connecting-bar, G, the outer end of which is pivoted to acam or crank of a shaft, H. The shaft H revolves in bearings attached tothe frame A, and has pulleys I attached to one end to receive thedriving-belt.

To the other end of the shaft H is attached a cone-pulley, J, to receivea belt, which also passes around a cone-pulley, K, attached to the endof the shaft of the fan-blower L, secured to the front end of the frameA.

The fan-blower L is provided with dischargeperforations l in the innerside of its case to direct a blast of air against the lower side of theforward part of the screen E.

The fan-blower L is also provided with a discharge-spout, 6 upon itsupper side to direct a blast of air between the forward end of thebolt-cloth of the screen E and the inner edge of the feedboard D tostrike the middlings as they fall from the lower edge of the saidfeed-board D and drive them up the separator M.

The separator M is inclined at an angle of about forty-five degrees (45and is formed of a number of narrow strips of sheet metal or othersuitable material, attached at their ends to side bars, having theiradjacent edges overlapping each other with narrow openings between them.

The lower edge of the lowest strip is placed close to the screen-cloth,and at a little distance from the inner edge of the feed-board D, sothat the blast, as it comes from the discharge-spout P, will be directedup the separator, carrying the middlings with it.

As the middlings pass up the separator the particles of middlin gs dropthrough the openings between the strips and fall down upon the forwardpart of the screen-cloth, while the specks, fuzz, and other lightimpurities pass over the upper end of the separator M with the blast,strike the curved shield or guideboard N, and are guided downward intothe rear part of the machine, and are carried out by the exhaust-fan 0into the dust-room.

To the rear edges of the side bars of the separator is attached a plate,m, for the double purpose of guiding the particles of middlings to theforward part of the screen and to separate the blast and the exhaustfrom each other.

The force of the blast from the fan-blowerL is regulated by dampers I inthe ends of its case, and the force of the exhaust through theexhaust-fan is regulated by dampers o,

placed in the passages leading to the ends of its case.

In the sides of the casing of the machine, below the rear part of thescreen E, are formed openings to admit air to pass up through thescreen-cloth and out through the exhaustfan O, and which are closed, orpartially closed, by plates or doors P.

The screen-cloth is kept clean by a cylindrical brush, Q, formedhycovering a roller with plush, velvet, carpeting, or other suitable material. The brush Q is pivoted to blocks It, which slide upon side barsof the frame A, and may be drawn back and forth by alielt orothersuitable gearing, which gearing is not shown in the drawings.

To one end of the qvlindrlcal brush Q is attached a ratchet-wheel. S,with the teeth of which engagesa pawl, T, pivoted to one of the slidingblocks R, so that the said brush Q will rotate when moving in onedirection, and will be held from rotating; and caused to brush the 2.The comhination of the cylindrical brush Q, the sliding blocks R, theratchet-Wheel S, and the pawl T with the screen E and the frame A,substantially as herein shown and described.

3. The combination of the inclined separator M, having back plate, m,thefeed-board D, the double blast-fan blower L, the guide-board N, and thescreen E, as shown and described.

RICHARD J. SKINNER.

Witnesses J. B. ALEXANDER, .lAs. KERNAN.

